<%= skyline_fields_for "article[variants_attributes][1][sections_attributes][#{guid}][sectionable_attributes]", sectionable do |s| %>
  <%= s.select :content_item_id, [["",""]] + @content_item_class.for_content_item_section.collect{|item| [item.respond_to?(:human_id) ? item.human_id : item.title, item.id]}%>
<% end %>